Topic 7 Vocab

3. the job that something is made to do
5. the death of all organisms in a species
8. a hard external covering on many invertebrates that maintains their shape and protects their organs
9. a rigid inner support in vertebrates made of bones
11. something that is on the outside of an organism or object
12. the organ in fish and young amphibians that takes in oxygen from water
17. an arrangement of particles for a specific purpose
18. a trait feature or quality
20. an action or change that causes a certain reaction in an animal
21. the main respiratory organ that takes in and releases air

1. the part of the flower that receives pollen and contains the ovary
2. the male part of the flower that makes pollen
4. to figure out the meaning of something
6. a system of tube-like parts of a plant that transport materials throughout the plant
7. the green leaf-like part of a plant that protects a budding flower until it is ready to bloom
10. an organ that pumps blood
13. something that is on the inside of an organism or object
14. the female reproductive part of a flower that holds the eggs
15. to sort objects or living things into groups based on shared traits
16. an organ that receives information from sense organs about the environment and then tells the body how to react
19. a waxy outer coating on a leaf that helps a plant control the amount of water that leaves the plant